Clay Matthews, American line backer for the Green Bay Packers.
Clay Aiken, American pop singer and former contestant on American Idol.
Clay Buchholz, Major League Baseball starting pitcher for the Boston Red Sox.
Henry Clay, 19th century U.S. statesman and orator. "The Great Compromiser."
Cassius Clay, the original name of boxing great Muhammad Ali.
Cassius Marcellus Clay, Kentucky Abolitionist and Emancipationist, instrumental in convincing Lincoln to sign the Emancipation Proclamation.